Wal-Mart retakes the lead on Fortune's annual list of the world's biggest companies. See which other outfits top our list.

Like rival GM, Ford is also in the red this year, by a whopping $12 billion. In 2006, CEO Bill Ford Jr. stepped aside to let former Boeing CEO Alan Mulally tinker with the
company's big problems. Revenues fell 10% from last year, making Ford the only company in the top 25 to see a decrease in sales. That bumped the carmaker down three notches on the
list.